method Command.prototype.optionimport { Command } from "https://deno.land/x/line@v1.0.1/src/command.ts"; option(optionName: string): string | boolean | undefinedGet the value of the specified option. ParametersoptionName: string The option in question. Returnsstring | boolean | undefinedThe value of the option in the command line or undefined if the option does not exist.